To be able to send and receive messages in parallel over a network connection, a program must use __________ of execution.

Which of the following are examples of control statements?

a) if b) if...else c) while d) b and c e) a, b and c

What type of hardware devices and computer programs can be used to obtain passwords by capturing key strokes on a targeted computer system?

A. Viruses B. Keyloggers C. Macro viruses D. Shells